Drill forging and sharpening machine.



C. O. BORKMAN,

DRILL PORGING AND SHARPENING MACHINE. APPLICATION PIILED AUG. 17. 1911. 1,022,925.

Patented Apr. 9, 1912.

2 SHEETS'-SHEBT 2.

3: Q6 25 "w JW IMHMK I Borkm cm CARL o. BoRKMaN, or VICTOR, COLORADO.

DRILL FORGING AND SHARPENING MACHINE. I

Specification of Letters Patent.

Application filed August 17, 1911. Serial mi. 644,622.

To all whom it may coacemi Be it known that I, Cam, 0. BQRKMAN,

1 a citizen of the United States, residing at Victor, in the county of Teller and State'of Colorado, have invented certain new and I useful Improvements in Drill Forging and Sharpening Machines; and I-do declare the following to be a full, clear, and exact description of the invention, suchas will enableothers skilled in the art to which it ap- I pertains to make and use the same.

, This invention relates to improvements in drill forging and sharpening machines.

One object of theinve-ntion is to improve the drill forging and sharpening machine shown in United States Patent No. 991,698

granted to me May 9, 1911, whereby a stronger, more durable, and eflicient construction is provided.

Another object is to provide a machine of this character having an improved construction and arrangement of drill forming dies and means for operating the same.

- Another object is to provide simple and eflicient means for operating the-tool grip.- ping jaws in opposite directions to open and close the jaws.

\Vith these and other objects in view, the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawings: Figure l is a planview of my improved drill forging and sharpening machine; Fig. 2 is a side view thereof; Fig. 3 is an end view of of the movable member of the forming die the same; Fig. 4 is a detail perspective view and its holder; Fig. 5 is a similar view of one member of the drill drawing dies.

My improved drill forgingand sharpening machine comprises a main supporting frame 1 having arranged in thecentral portionthereof a vertically disposed die holding and guiding recess 2 in the lower p01 tion of which is arranged the stationary member 3 of an upsetting onforming die by means of which the cruci-form drill bits are formed.

Slidably mounted in the recess 2 above the stationary member 3 of the die is a holder 4 to which is det-achably and adjustably secured the-upper movable member 5 of the forming die.

The holder 4 comprises a' plate having offset side edges adapted to engagefoflset grooves in the side walls of the recess 2 and matrix in the movable die.

having on its upper end a right angularly projecting lip or flange 6. The die member 5 is shown in the form of a flat rectangular block in the edges of which are formed matrices which are of the sameshape but of differentsizesand in the present instance are shown as of cruci-form shape. The die member or block 5 is secured to the holder by means of a centrally disposed supporting bolt 7 which is adapted to be engaged with a circular passage 8 formed through the center of the die or block 5. block 5 is held on the bolt 7 and in engagement with the back plate 4 and'flange 6 of the holder by a transversely disposed fastening pin 9 which is inserted through the projecting outer end of the bolt 7. By thus arranging the die member 5 the fastening pin 9 may be removed and the member slipped'outwardly on the bolt 7 beyond the edge of the flange 6 whereupon the die member may berevolved to bring any of the matrices into an operative position afterv which the, die member is pushed back on the supporting bolt 7 beneath the flange 6 of the holder and is secured in position by the fastening pin 9. The stationary die 8 is similarly mounted and adapted to be revolved to bring the desired matrix therein in position tocooperate with the corresponding end of the die holder 4 are arranged parallel apertured lu'gs 10-which are pivotally connected to a die operating-lever 11 pivoted at its inner end to a bracket 12 secured to one side of the frame and connected atits outer end by a link 13 to an equalizing lever 14. secured to the outer end of a piston rod 15 the piston of which is arranged in a cylinder 16 and adapted to be acted upon by any suitable fluid or hydraulic pressure whereby the piston rod is projected and the die holder 4 thus'actuated to bring the die member 5 into operative engagement with the work.

In addition to the upsetting die, I. also preferably provide 'a drill holding or clamping mechanism by means of which the shank of the drill is firmlyhelcl. while the ,drill is being formed. The drill holding or clamp ing mechanism comprises clamping jaws 17' Patented Apr. 9, 1912.

On the upper on each side of its pivotal connectionare secured the lower ends of the links 18. By thus connecting the links 18 to the lever 19 it will be seen that when the lever is swung downwardly the links 18 will draw the jaws 17 together and into engagement with the drill shank and when said lever is swung upwardly the links will move the jaws outwardly in opposite directions or out of engagement with the shank of the drill thereby releasing the latter. The free or outer end of the lever 1.9 is connected by a short link 20 to the end of the equalizing lever 14 opposite that to which the link 13 of the die operating lever is connected. By thus conneeting the levers 11 and 19 with the piston rod 15 it will be seen that said levers will be actuated to simultaneously operate the forming dies and the drill holding mechanism.

Arranged in one end of the frame is an upsetting hammer 20 said hammer being slidably supported by a suitable guide 21 and having arranged in one end a dolly 22 which isadapted to be brought into forcible engagement with the end of the drill for the purpose of upsetting the same. with the opposite end of the hammer is engaged the outer end of a piston rod 23' on the inner end of which is arranged a piston (not shown) but which is slidably and operatively arranged in a cylinder 24 and is adapted to be actuated by any suitable form of fluid pressure let into the cylinder 2 1. The upsetting hammer and its operating mechanism ust described'is constructed and ar- I ranged and is for the same purpose as the upsetting hammer shown and described in my previous patent hereinbefore referred to. In addition to the forming and upsetting mechanism the invention further contemplates the drawing of the drills and to this end is provided on one side of the main frame with a laterally projecting die supporting frame 25 in-which is arranged and suitably secured one member 26 of my improved drawing die, the other member 27 of which is suitably secured in an operating block or hammer 2S which is slidably mounted between vertically disposed guide plates 29 secured to the frame 25 and connected at their upper ends by a cross bar 30 and bet-ween their ends by a cross bar 31. Between the bars 29 and the upper and lower cross bars 30 and 31 is arranged a centrally disposed fluid pressure cylinder 32 with which is operatively engaged a' piston rod 33, the outer end of which is secured to the operating block or hammer 28 whereby the latter and the die member 27 are reciprocated to bring said die member into operative engagement with the stationary die member 26. Any suit-able fiuid pressure may be employed in the cylinder 32 andsaid pres sure is controlled by a suitable valve 34am which is connected an operating rod 35, said rod extending downwardly and having its lower end connected with a suitable foot treadle 36 arranged on and connected to the adjacent side of the extension 25 of the frame.

' The members 26 and 27 of the drawing die are each constructed of a series of sections having shaped upper edges which, when brought into operative engagement with each. other form matrices of the desired size and shape; The end sections of the die members have their outer surfaces inclined or formed on an angle whereby when the sections of'the die members are assembled a substantially key-stoneshaped structure is formed. The sections of the die members are secured together in operative position by a transverse connecting bar 37 which is adapted to be engaged with a similarly shaped roove or channel 38 formed in the outer sides of the sections of the die members as clearly shown in Fig. 5 of the drawing. The bar 37 when engaged with the recess 36 will hold the sections of the die members together in perfect alinement. The die members 26 and 27 are engaged with keystone shaped recesses 39 formed in the frame 25 and hammer 28, and when so arranged said die members are securely fastened by 95 suitable keys 40 arranged in the walls of the recesses 39 as shown.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the inven- 10g tion will be readily understood without requiring amore extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the prin- 105 ciple or sacrificing any of the advantages of the invention as claimed.

' Having thus described my invention," what I claim is:

-1. A drill forging and sharpening ma- 1 chine comprising a main frame, a drill-forming die operativelymounted in said frame,

a drill holding mechanism comprising a pair of slidably mounted drill gripping jaws, a pivotally mounted jaw operating 1 5- ably support and operate said moveble fand. with said gripping jaws, and means I for actuating said equalizing lever, a dolly,

holder mounted in said structure, drill member, apair of drill gripping jaws, and means connected to simultaneously move said gripping jaws in opposite directions and to operate said movable die member, a dolly,

a and operatin -mechanism for said dolly.

3a In a dri l forging and sharpening ma-- chine a supporting structure, dies mounted in said-.; structure, a vertically movable holder for] one of said dies, drill ating said die holder and moving said gripping jaws in opposite directions, a dolly, and operating mechanism forsaid dolly.

' a. In ajdrillforging and sharpening machine, a supporting structure, a movable die holder mounted in said structure, drill gripping jaws, and means for actuating said gripping jaws and said movable die holder simultaneously, comprising an [equalizing lever, aseries of levers connected-with said equalizinglever on one side of itsfulcrum. and with-said movable die holder, another series of levers connected with sai'd equalizing iever on the other side of its fulcrum and operating mechanism forsaid dolly.

,5. In a drill forging and sharpening machine, a supporting structure, a movable die 1 ,gripping jaws, and means .for actuating flf-said gripping jaws and said movable die holderfsimultaneously, comprising an equal- 5 ijizin ii-lever, a series of levers connected with i i -sa1d' equallzlng lever on one side of 1ts tulcrum and with said movable die holder, an-

'ripping Jaws and means for slmultaneoua ly actua and operating mechanism forsaid dolly.

: 6 A drill forging and sharpening machine .QOIIIPI'IlSlIlg a supporting frame, a drill forming die comprising a stationary anda movable member, a holder to adjustably supporfiand operate said movable die member, a die operating ver connected a piston rodnperfatively mounted therein, an equalizinglever connected with the outer end of said. plstonrod, a link toconnect said equalizing l ver with said dieoperatinglever, a pair of drill gripping jaws, a pivotally mounted \jaw operating lever,

the opposite sides of its pivotal connection, and a link to connect the outer end of said aw operating lever with the equalizing lever on said piston rod whereby said jaws are operated simultaneously with the operation of the movable die member. 7 In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

- CARL O. BORKMAN.

Witnesses:

J. S. 'LIVESAY, ARTHUR BRACKETT.

with said holder a fluid pressure cylinder,

links to connect said'jaws with said lever on mediately of the ends of said lever, a dolly, 

